diff --git a/lib/libsysdecode/flags.c b/lib/libsysdecode/flags.c
--- a/lib/libsysdecode/flags.c
+++ b/lib/libsysdecode/flags.c
@@ -34,6 +34,7 @@
 #include <sys/linker.h>
 #include <sys/mman.h>
 #include <sys/mount.h>
+#include <sys/poll.h>
 #include <sys/procctl.h>
 #include <sys/ptrace.h>
 #include <sys/reboot.h>
@@ -565,6 +566,13 @@
 	return (print_mask_0(fp, pipe2flags, flags, rem));
 }
 
+bool
+sysdecode_pollfd_events(FILE *fp, int flags, int *rem)
+{
+
+	return (print_mask_int(fp, pollfdevents, flags, rem));
+}
+
 const char *
 sysdecode_prio_which(int which)
 {
diff --git a/lib/libsysdecode/mktables b/lib/libsysdecode/mktables
--- a/lib/libsysdecode/mktables
+++ b/lib/libsysdecode/mktables
@@ -114,6 +114,7 @@
 gen_table "msyncflags"      "MS_[A-Z]+[[:space:]]+0x[0-9]+"                "sys/mman.h"
 gen_table "nfssvcflags"     "NFSSVC_[A-Z0-9]+[[:space:]]+0x[0-9]+"         "nfs/nfssvc.h"
 gen_table "pathconfname"    "_PC_[A-Z4_]+[[:space:]]+[0-9]+"               "sys/unistd.h"
+gen_table "pollfdevents"    "POLL[A-Z]+[[:space:]]+"                       "sys/poll.h"
 gen_table "prio"            "PRIO_[A-Z]+[[:space:]]+[0-9]"                 "sys/resource.h"
 gen_table "procctlcmd"      "PROC_[A-Z_]+[[:space:]]+[0-9]"                 "sys/procctl.h"	"PROC_TRACE_CTL_"
 gen_table "ptraceop"        "PT_[[:alnum:]_]+[[:space:]]+[0-9]+"           "sys/ptrace.h"
diff --git a/lib/libsysdecode/sysdecode.h b/lib/libsysdecode/sysdecode.h
--- a/lib/libsysdecode/sysdecode.h
+++ b/lib/libsysdecode/sysdecode.h
@@ -83,6 +83,7 @@
 bool	sysdecode_open_flags(FILE *_fp, int _flags, int *_rem);
 const char *sysdecode_pathconf_name(int _name);
 bool	sysdecode_pipe2_flags(FILE *_fp, int _flags, int *_rem);
+bool	sysdecode_pollfd_events(FILE *fp, int flags, int *rem);
 const char *sysdecode_prio_which(int _which);
 const char *sysdecode_procctl_cmd(int _cmd);
 const char *sysdecode_ptrace_request(int _request);
diff --git a/lib/libsysdecode/sysdecode_mask.3 b/lib/libsysdecode/sysdecode_mask.3
--- a/lib/libsysdecode/sysdecode_mask.3
+++ b/lib/libsysdecode/sysdecode_mask.3
@@ -22,7 +22,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd March 3, 2022
+.Dd February 29, 2024
 .Dt sysdecode_mask 3
 .Os
 .Sh NAME
@@ -43,6 +43,7 @@
 .Nm sysdecode_msync_flags ,
 .Nm sysdecode_open_flags ,
 .Nm sysdecode_pipe2_flags ,
+.Nm sysdecode_pollfd_events ,
 .Nm sysdecode_reboot_howto ,
 .Nm sysdecode_rfork_flags ,
 .Nm sysdecode_semget_flags ,
@@ -96,6 +97,8 @@
 .Ft bool
 .Fn sysdecode_pipe2_flags "FILE *fp" "int flags" "int *rem"
 .Ft bool
+.Fn sysdecode_pollfd_events "FILE *fp" "int flags" "int *rem"
+.Ft bool
 .Fn sysdecode_reboot_howto "FILE *fp" "int howto" "int *rem"
 .Ft bool
 .Fn sysdecode_rfork_flags "FILE *fp" "int flags" "int *rem"
@@ -191,6 +194,13 @@
 .Dv F_SETFL
 .Xr fcntl 2
 commands.
+.It Fn sysdecode_pollfd_events
+The
+.Fa events
+and
+.Fa revents
+members of a
+.Vt struct pollfd .
 .It Fn sysdecode_sctp_nxt_flags
 The
 .Fa nxt_flags